摘要
A process for recovery of RE from Baotou rare earth concentrate was developed by fixing the fluorine and chlorinating RE with ammonium chloride in the ore. The optimum conditions were determined as follows: fixing the fluorine of the ore 80 min with the MgO dosage m (ore) / m (MgO) =3∶1 at 600 ℃; chlorinating the fixed fluorine calcine 80 min, with NH 4Cl dosage m (NH 4Cl) / m (ore) =2∶1 at 500 ℃. The RE recovery reaches 85% under optimum conditions. The products of fixing fluorine with MgO were determined by X ray diffraction, and the mechanism of fixing fluorine was also discussed.
A process for recovery of RE from Baotou rare earth concentrate was developed by fixing the fluorine and chlorinating RE with ammonium chloride in the ore. The optimum conditions were determined as follows: fixing the fluorine of the ore 80 min with the MgO dosage m (ore) / m (MgO) =3∶1 at 600 ℃; chlorinating the fixed fluorine calcine 80 min, with NH 4Cl dosage m (NH 4Cl) / m (ore) =2∶1 at 500 ℃. The RE recovery reaches 85% under optimum conditions. The products of fixing fluorine with MgO were determined by X ray diffraction, and the mechanism of fixing fluorine was also discussed.
出处
《中国有色金属学会会刊：英文版》
CSCD
2003年第2期438-442,共5页
Transactions of Nonferrous Metals Society of China
基金
Project( 5 980 40 0 4)supportedbytheNationalNaturalScienceFoundationofChina
Project( 5 972 5 40 8)byOutstandingYouthFoundationofChina
关键词
回收
稀土
氯化焙烧
稀土矿
富集
rare earth concentrate
fixing fluorine
chlorinating
rare earth
